رحلات طيران رخيصة "SAR 1,872" من سياتل (SEA) إلى واشنطن (IAD)

With Alaska Airlines, a direct flight takes around 4 hours and 56 minutes. Step on board the 4:03PM flight from Sea-Tac Airport and reach Dulles Intl. Airport at 11:59PM. Snag an epic deal on this and other routes when you use Expedia to book your trip.

When it comes to booking your flights, it pays to be prepared. While it may be possible to pick up a last-minute deal on a Sea-Tac Airport to Washington Dulles Intl. Airport (IAD) flight, tickets usually don't get cheaper as the departure date nears. Based on flight pricing and demand studies in 2022, we have found that the sweet spot to book a domestic flight is between 28 – 35 days in advance. For international travel it's between three and four months.

Achieving an on-time rate of 88%, Alaska Airlines is the airline that's likelier to fly you from Sea-Tac Airport to Washington Dulles Intl. Airport (IAD) without any hiccups. Flight delays aren't just annoying — they can also cause you to miss a vital connection that upends your entire trip. You can prepare for delays by reviewing your flight status through the free Expedia App before you even reach the airport. If you're already there and you're worried about how the disruption will affect your trip, visit your airline's customer service desk for more information.

Washington Dulles Intl. Airport (IAD), Ronald Reagan Washington National Airport (DCA) and Baltimore Washington Intl. Thurgood Marshall Airport (BWI) are your choices when taking off from Seattle to Washington. Approximately 40 kilometers west of central Washington, Washington Dulles Intl. Airport (IAD) is the city's principal entry point. Think about factors such as flight arrival and departure times and the distance to your hotel before you select an airport. White House and United States Capitol are a couple of fantastic attractions to visit when you arrive.

Between 8:00 AM - 9:00 AM is when you'll find the most Delta Air Lines flights departing SEA to Washington Dulles Intl. Airport (IAD). Our handy tip? Leave early. With air traffic yet to build up around airports, your chances of jumping on a delay-free flight are higher.

It's easy to make changes to your SEA to Dulles Intl. Airport trip yourself. Simply go to the Expedia Trips portal and click on "change flight." Search for new flights and lock in the one that works with your new plans. You'll get an estimate of applicable flight change fees. Alternatively, visit our Customer Service portal to connect with our Virtual Agent and get answers to all your questions.